Mr Vaz is facing a possible investigation by Commons sleaze watchdogs as the fallout from reports that he paid two male escorts for their services threatens to overwhelm his career.

The high-profile Leicester East Labour MP indicated he will stand aside as chairman of the Commons Home Affairs Committee at a meeting yesterday after publicly apologising to his wife and children for the "hurt and distress" he caused them.

Speaking in a calm voice, Mr Vaz welcomed the new Home Secretary to her role and asked about the terror suspects who have fled Britain to join IS (Islamic State) while on police bail.

Earlier, the Prime Minister was asked about the scandal at the G20 summit in China. She said: "I have always been clear that what is important for people is that they feel that they are able to have confidence in their politicians. That is what I think we all have a duty to provide for those who elect us."

Meanwhile, Tory MP Andrew Bridgen said he would write to the Parliamentary Commissioner for Standards regarding Mr Vaz's conduct.

Mr Bridgen has been highly critical of the Labour MP and is expected to write to Scotland Yard calling for Mr Vaz to be investigated for misconduct in a public office and conspiracy to supply controlled substances.